Nut-lock.



PATENTED FEB. 19, 1907.

J. K. GOURDIN.

NUT LOGK. APPLICATION FILED SEPT. 15, 1905.

fm/cvvfor JOHN KCS U Rom Afro/r7653 UNITED STATES;

JOHN K. GOURDIN, OF PINEVILLE, SOUTH CAROLINA, ASSIGNOR OF ONE- HALF TOROBERT L. MONTAGUE AND ROBERT P. TUCKER, OF CHARLES- TON, SOUTH UAROLINA.

PATENT orrron NUT-LOCK.

Patented Feb. 19, 1907.

Application filed September 15. 1905. Serial No. 278,633.

To all whom, it 7nd concern: a

' Be it known that L'JonN K. GoIiRDIN, 'a citizen of the United States,residing at Pineville, in the county of Berkeley and State of SouthCarolina, have made certain new and useful Improvements in Nut-Locks. ofwhich the following is a specification.

My invention is an improvement in nutlocks, and consists in certainnovel constructions and combinations of parts, as will be hereinafterdescribed and claimed.

In the drawings, Figure 1 is an elevation, partly in section, of a boltand nut embodying my invention. Fig. 2 is an end elevation of the boltand nut and locking device. Fig. 3 illustrates in side and end view thelocking-key. Fig. 4 is a detail end elevation of the bolt. Fig. 5 is adetail elevation of the nut. Fig. 6 is an elevation of the bolthead.Fig. 7 is a plan view of the bolt looking at the grooved side thereof,and Fig. 8 is a cross-section on about line 8 8 of Fig. 1.

The bolt A is provided across its threads with the longitudinal grooveD, which receives the locking-key O, driven in practice into saidgroove'and into a groove E in the threaded bore of the nut B. Forconvenience I provide the nut Bwith a plurality of grooves E, and theouter or base wall B of each of these grooves ta ers inwardly, as bestshown in Fig. 1', for t tracting the cross-sectional area of the recessfor the key 0 in order to secure a better spreading of saidkeylaterallyinto the spaces between the nut and bolt in order to lockthe key in place when driven home in the use of the invention. Thisinclination or taper of the base-walls B of the grooves E also operatesto increase the frictional resistance to the introduction of soft-metalkeys, and thus increases the spreading tendency when the keys are drivenhome.

The key O is of soft metal. It maybe lead such as is ordinarily employedin making shot, and when pressure is applied to the key it will becaused tospread laterally into the spaces in the threads of the bolt andof the nut, and thus lock the key from accidental displacement. Toincrease this locking effect of the key, I prefer to cut away portionsof the threads at the opposite sides of the groove D in the bolt,usually every alternate thread for a distance of about one-sixteenth epurpose of con' of an inch in bolts of ordinary size, whereby to formsockets D at the opposite sides of the groove D, into which the softmetal of the key 0 will be forced in order to anchor the said key whenthe latter is hammered into the space between the'bolt and nut, as willbe understood from the drawings. The sockets D, extending laterally fromthe opposite sides of the-groove D, constitute anchorages in which thesoft metal of the key will be forced to .lock the key from displacement.

In compressing the key in the space beextra force exerted to cut thesoft-metal key and permit the nut to be removed.

Having thus described my invention, what I claim as new, and desire tosecure by Letters Patent, is

1. The combination substantially as herein described, of the bolt havinga threaded portion and a groove across the same and having some of thethreads broken away at their ends adjacent to the groove forminganchoring-sockets, the nut turning o the bolt and provided across itsthreaded bore with a groove which may be turned to coiricide with thatin the bolt, the base-wall of said groove being inclined or taperedwhereby to decrease the cross-sectional area of the groove toward itsinner end, and the softmetal key fitted in the coincident grooves of thebolt and nut and forced under pressure laterally in theanchoring-sockets on opposite sides of the bolt and groove and into thespaces between the threads of the bolt and nut, substantially as setforth.

2. A bolt having a longitudinal groove crossing its threaded portion andhaving lateral anchoring-sockets at the sides of and communicating withsaid longitudinal groove.

3. A nut having a longitudinal groove across its threaded bore andhaving the basewall of said groove inclined inwardly toward the innerend of the nut whereby to increase the frictional resistance to theintroduction of a key, and the soft-metal key 'fitted to said groove thebolt having lateral anchoringits threaded bore arranged to coincidewithsockets at the sides of and communicating that in the bolt, and thesoft-metal key I: with said groove, substantially as set forth. driveninto the coincident grooves of the bolt 4. The combination of the bolthaving a l and nut, substantially as set forth. longitudinal grooveacross its threaded por- JOHN 'K. GOURDIN. tion and having lateralanchoring-sockets at l Witnesses: the sides of said longitudinal groove,a nut l SoLoN C. KEMoN, fitted to said bolt and having a groove acrossPERRY B. TURPIN.

